Automatic lubricator



Nov. 22, 1927.

P. A. NELsoN AUTOMATIC LUBRICATOR Filed Ju1y.12, 1926 2 Sheets-Sheet 1 Nin-22, 1927.

P. A. NELSQN AUTOIIATIC IJUBRIJATORV I Filed July 12, 1.9.25

2 Sheets-Sheet- 2 Patented Nov. Z2, 1927. l l d UNITED STATES PAUL AjiviiLsoi'r, or DENVER, COLORADO, AssIGNOR 'ro THE lDENVER ROCK `DRILL Y MANUFACTURINGQCOMPANY, OF DENVER, COLORADO, A CORPORATION 'or DELA- WARE.

AUTOMATIC LUDRICATOR.

` Application nleaJuly 12,1926. r.serial No. 121,980.

The present, invention relates more'particularly to lubricating mechanism for rock drill Sharpeners, though it may be employed in other analogous relations.

The object is to provide m-eans of a simple and effective character, whereby lubricant is supplied to the motive Huid that enters the instrumentalities operated by such motivev fluid, so as to llubricate the moving parts thereof.

In the accompanying drawings s Figure 1 is .a view partly in elevation land partly in section of a drill sharpener equipped with the lubricating mechanism.

Figure 2 is an enlarged sectional view through the controlling valve and the lubricant delivery means,

Figure 3 isa cross sectionalv view on the line* 3-3 of Figure 2.

and illustrated in my co-pending application, Serial No. 110,137, filed May 19, 1926. It is believed to berunnecessaryfto go into det-ail regarding this structure except to state that it consists of a pair of work- Olamping dies 4 and 5, the upper die 5' Vbeing carried by a plunger rod thatis connected to a piston 7. This piston is located in a cylinder `8, and motive iiuidis supplied to the upper end of the cylinder through a passageway 9 to operate on Vthe piston 7, and move the die 5 downward intofcoaction with the die 4. 1n order to clamp the work, a dollying hammeris shown at 10, and motive fluid is supplied thereto throughV a conduit 11. Mounted on the side of the machine is a valve casing 12 containing a valve 13 that controls the supply of motive fluid to the passageway 9 and conduit 11 to'control the operation of the piston 7 and dollying hammer 10. Motive iiuid is supplied to the valve casing through a conduit 14 from any suitable source, this conduit being connected to a constant pressure chamber 15 ,in the valve casing. A l Y lAs is fully set forth in the aforesaid copending application, when the valve 13 is moved to thev right, motive fluid ,'from' the chamber 15 is admitted first to the passageway 9, whereupon the piston 7 is moved downwardly and thereafter motive fluid is supplied to the conduit 11 to cause the actuar tion the dellying hammam Thestructure disclosed is a drill sharp-v ener, and is preferably yof the type describedy itheleft, the 'pertkThe present invention relates to means yfor introducing lubricant into this motivefiuid, so that the moving parts of the said in- `strunientalities are properlyv lubricated. To this endthereris formed on Vthe sidey of thev machine and on the'upper side Ofthevalve ,t

casing 12 a lubricantreservoir 16having a 17, and also preferably provided with a reservoir has an outlet 19 in its bottom `filling opening closed by a'removable plug v that opens into an annular groove-20 formed Y inthe valve vcage 21. Said valve cage Vis Opening into the constant pressure,V chamber 15.- A piston 23 reciprocates inthe boreV and has a stem 24 that extends' yacross the groove 20 and is' provided with a reduced portion, vforming a pocket 25 .that is 4Inov-l able between a position in said groove yand 'a vposition in the pressure chamber 15.' yA

plug 26 in the o uter end of the bore 22 has a stop pin 27 in the path of the piston. Ports 28 and 29 afford communication bethe valve chamber. The valve 13 lhasa'n outer head 30 that is'movable across the f ports 28 "and 29.

Assuming the parts as shown in Figures 1 and 2, it will` be understoodl that'fiuid under pressurevis in the chamber 15,but thisfluid is cut off from the passageway 9 and conduitl 11. At vthe same time, the port 28 "isope'ned to the motivefiuidin the chamber 15, while the port '29 is closed by the head `30.015 the valve 13. If'now, the valve is `moved to the right, the passageway 91s first Openedlto motive fluid, and thereafterthe conduit'll -is also opened to said'motive fluid.- In this movement-'the head 30 first Vcloses the port 28, thus cutting off motive fluid from the piston chamber 22,l and after wards .said head uncovers the port 29 to atmosphere. The consequence is that kthe motive fluid inthe chamber 22 will exhaust and thel motive fluid acting against the -shoulder31 of the piston 23wil1 vcauseV said piston to move-'to the left. `This will carry the pocket 25filled with oil into communication with the pressure chamber v15, .so thatthe oil will be :delivered into the lmotive'.fluid supply'. When'the valve'isagaa insvd to 29 ein am as assed mi Construction@relation and may advantages of the herein described invention Will be viapparentvtothose skilled in the art, Without `v4further,description, and it will be' under- .,'Sl'OQd ,that various changes inthe size, shape, tprop ortion and minor details ot construc- -ti'on, be *resortedV to 'Without departing .fi-fecal the spint. .0r .SaQrCi-aa any f @heeft V1{vantages of the invention.

i hat -l'iclaim, is:

,11.111 I nechanism of `the character set forth, the combination with a valve casing 'having afluid supply chamber, means for ,constantly supplying tluid to said chamber, y anon-tiet means for the fluid opening from the valve, casing, a valve in the casing` 'for controllingthe passage ot' fluid :trom the supply chamber to .the outlet means, alubricant reSeHQrhaving,an outlet into the valve Casing, a piston valve eontrollingthe lubriicantvoutlet and having` an actuating,` piston, anda piston chamber inwhich said piston operates, said piston chamber having` a motive .fluid supply port opening,l into the fluid supplyV chamber, said supply port being coveredand vuncovered by' the valve on its movement to' open and cut off communication between the supply chamber and outlet vmeans ot' the valve chamber.

Y In mechanism of' vthe character set forth, tlie combination with a valve casing having Va fluid supply chamber, means for constantly' supplying fluid to said chamber, an' outlet mean'stor the fluid opening from the valve easing, a valve in the casing for 'controlling' the passage ,of fluid trom the supply chamber to the outlet means, a lubricant reservoir having an outlet into the .valve casing, a pistonr valve controlling the lubricant outlet and. having` an` actuating; piston, and apiston chamber in which said piston' operates, said piston chamber having `a motive luid supply port opening into the fluid supply chamber, and "also having an .eXhaustport,`said' supply port and exhaust -port .being alternately covered and uncovered by the 'valve onA its movement to o'pen andcut oil" communication between A.the supply chamber and outlet means oit the valve chamber.

In" mechanism of the character set forth, the 'combination with. avalve casing l5 having la fluid .supply chamber, means for ture.

constantly Vsupplying` fluid to said chamber, an outlet nieansVv for the fluid opening from theffvalve'casing, a valvein the' casing 'for controlling the passage of fluidV from the supply chavmher fto the outlet n'ieans, a 'lubricant reservoir havinganbutle'tinto the valve casing', a piston 'valvecon lng the .lubricant noutlet and having afi aictilating` pist i provided with opposing surfaces'of dille-rent areashsaid areas vbeing,` normally operated against"simultaneously by the imd of theiiuid supply chamber -vand thereby i coi'itrolling the passage of :fluid Qtrointhe.

supply chamber to ,the outlet means, a lubricant reservoir haiing an outlet into thevalve casing, a piston valvecontrolling the lubricant outlet andvhaving aniactiiating `piston provided with opposing` 4surt'aces of 1d itlereni areas, said valvecasing havingfsupply ports opening 44from the fluid supply A chamber and simultaneously Vadnflitting ,fluid to said opposing surfaces of thepiston, Jan vexhaust permitting means from the surface of, greater area, and a heard 4on the valvefthat ,controls the supplyrport and exhaustjport Qt the-larger area to close one and open the other alternately.A V i l ln mechanism V,oli vthe character set `'lortluthe combination with a fluid operated instrument to be lubricated, and means for supplyingniotive jfluid thereto, a valve casiup` `constituting a part the motiveiluid supply .means and havingy ajconstant.pres-v vsure chamber, a valve .in Asaid casing .con-

trol-lungv the passage oft motive Vluidfrom the constant pressure chaii'iberto the `instru- ,ment, a lubricant ref-gservoirhaving au outlet, A

a. cylinder openinuinto the rconstant pressure chamber, a piston in said cylinder operated Yon by the Vfluid in the constant pressure chamber ,and havingl a Vstem provided with a lubricant pocket that -isinovablebetween the reservoir outlet and the Vconstant pressure chamber on the movement ot' the piston, and ports between the constant pressure chamber andthe cylinder and controlled by the valve .tor admitting andrenhausting luid to, the cylinder and ,against the piston.

ln testimony whereof, l alix my signareut aanmet- 

